EP2404950A1 - New polyester modified organopolysiloxanes - Google Patents

Abstract

Polyester-polysiloxane block copolymer exhibiting polysubstituted lactone monomer units, is new. Independent claims are also included for: (1) preparing polyester-polysiloxane block copolymer; and (2) a composition comprising the polyester-polysiloxane block copolymer.

Description

The invention relates to novel polyester-polysiloxane block copolymers, processes for their preparation and their use.

Organomodified siloxanes are used in a wide variety of applications. Their properties can be adjusted by the type of modification and by the modification density targeted.

Block copolymers can combine the properties of the individual polymer types and are therefore very interesting for many applications. Polyester-polysiloxane block copolymers are described, for example, in US 4,663,413 described. For the construction of the polyester-polysiloxane block copolymers exclusively ε-caprolactone and linear α, ω-modified siloxanes are used here. The products are used as surface modifiers for other polymers. In US 3,778,458 the hydrosilylation of polyether-polyester copolymers is described. To produce the polyester segment, ε-caprolactone is also used here exclusively. In US 5,194,473 describes the use of polyester siloxanes in bioabsorbable materials for medicine. The polyester segment is based here on polymerization of lactide or glycolide. Multiple substituted with side chains lactones such as 3,3,5-trimethylcaprolactone are not described. Also in Yilgör et al. (Journal of Polymer Science, 1989, Vol. 27, 3673-3690 ) Lovinger et al. (Journal of Polymer Science (Part B: Polymer Physics) 1993, Vol. 31, 115-123 ) Kricheldorf et al. (Macromol Biosci 2001, 1, 364-369 ) and Clarson et al. (Silicon 2009, 1, 165-172 ), the synthesis of polyester-polysiloxane block copolymers is described, which takes place by the addition of ε-caprolactone to hydroxy-functional siloxanes.

There are also commercial products based on polyester-polysiloxane block copolymers and are, for example, under the brand name TEGOMER ^® H-Si 6440 P (Evonik Goldschmidt GmbH, Germany) sold. These are used for example as plastic additives.

The polyester-polysiloxane block copolymers prepared with industrially available lactones such as ε-caprolactone are waxy or solid at polyester contents of about ≥50%. This can lead to formulability problems in certain applications. In addition, these polyester-polysiloxane block copolymers based on, for example, ε-caprolactone are usually poorly soluble (or not readily soluble) in, for example, cosmetic oils such as C ₁₂ -C ₁₅ -alkyl benzoate. For effective applicability and operability, however, sufficient compatibility with the respective medium, such as the cosmetic oil or the polymer to be modified is necessary.

Poly-substituted lactones having alkyl side chains (i.e., ≥2 alkyl side chains on the lactone ring) are usually much more difficult to react to polyester than unsubstituted lactones such as ε-caprolactone. Steric reasons make the polymerization more difficult and only low conversions of lactone are achieved by the customary processes. Block copolymers with siloxanes are even more difficult to obtain because of compatibility issues. For this reason, no explicit studies on the reaction of siloxanes with polysubstituted lactones can be found in the literature.

A technically accessible, multi-side-bearing lactone is trimethylcaprolactone (3,3,5-trimethylcaprolactone CAS [2549-56-6] and 3,5,5-trimethylcaprolactone CAS [2549-57-7]). There are no polyesters yet Polysiloxane block copolymers with trimethylcaprolactone known. This can be explained by the fact that it is not possible to prepare polyester-polysiloxane block copolymers with trimethylcaprolactone in high yields using the methods known hitherto.

However, the preparation of polyester-polysiloxane block copolymers with multi-substituted lactones, such as trimethylcaprolactone, would be desirable in order to arrive at products having novel properties and compatibilities.

An object of the present invention was therefore to synthesize novel, polyester-modified siloxanes and to provide a process for their preparation, and their use.

The object is achieved by the reaction of multiply substituted lactones, preferably trimethylcaprolactone, with siloxanes.

The invention relates to polyester-polysiloxane block copolymers having multiply substituted lactone monomer units. The substitution preferably consists of alkyl groups, particularly preferably of methyl groups, and in particular the lactone monomer unit is a trimethylcaprolactone group.

Another object of the invention is a process for preparing the polyester-polysiloxane block copolymers according to the invention using poly-substituted lactones.

Another object of the invention is the use of polyester-polysiloxane block copolymers having multi-substituted lactone monomer units, thereby providing new application properties and compatibilities.

In addition, in the synthesis of the products, such high conversions (> 60%, preferably> 70%, in particular> 85%) of the lactones used are to be achieved so that unreacted lactone does not have to be distilled off at the end of the reaction. Furthermore, the reaction should have a high selectivity (> 70%, preferably> 80%, in particular> 90%) with respect to the polyester-polysiloxane block copolymer to be formed. For example, the formation of homopolymer (based on the lactone) should be suppressed because it may affect the properties of the polyester-polysiloxane block copolymer. For this, it is desirable to maintain the reaction under mild conditions, i. at temperatures of at most 110 ° C, preferably ≤100 ° C, in particular ≤90 ° C to perform.

Description of the invention:

Surprisingly, an access was found to novel polyester-polysiloxane block copolymers containing multiply substituted lactones as monomer units. Polyester-polysiloxane block copolymers of the general formula (I) are preferred. These show unique properties compared to the known polyester-polysiloxane block copolymers. For example, they have a low tendency to crystallize, so that the products are completely amorphous or characterized by a relatively low melting point or range (<50 ° C). In addition, they have improved compatibility with, for example, cosmetic oils, ie they are clear and homogeneously soluble therein in amounts of at least 0.2%.

Another object of the invention is a process for the preparation of polyester-polysiloxane block copolymers having multiply substituted lactone monomer units. In this case, OH, NRH or COOH-functional siloxanes with multiply substituted lactones such as trimethylcaprolactone and optionally further unsubstituted lactones such as ε-caprolactone and bismuth (III) triflate or methylaluminoxane (MAO) are reacted as a catalyst.

Another object is the use of polyester-polysiloxane block copolymers of the general formula (I) in cleaning and care formulations, as plastic and coating additives, as well as in formulations in the agricultural sector.

mit

Z

= unabhängig voneinander gleiche oder verschiedene lineare oder verzweigte Alkylreste mit 1 bis 6 Kohlenstoffatomen oder Wasserstoff, bevorzugt Methyl oder Wasserstoff und

y

= 1 bis 5, bevorzugt 2 bis 4, insbesondere 4,

mit der Maßgabe, dass
zumindest zwei der Reste Z in Formel (0) Alkylreste und kein Wasserstoff sind, und mit der Maßgabe, dass der Lactonblock über SiC-Verknüpfung an das Siloxangerüst gebunden ist.An object of the invention are polyester-modified siloxanes which contain at least three multiply substituted lactone monomer units and optionally further unsubstituted or monosubstituted lactone monomer units. In a further embodiment of the invention, the multiply substituted lactone monomer units used to prepare the products may be the same or different independently of one another and are described by the general formula (0):

With

Z

= independently of one another identical or different linear or branched alkyl radicals having 1 to 6 carbon atoms or hydrogen, preferably methyl or hydrogen and

y

= 1 to 5, preferably 2 to 4, in particular 4,

with the proviso that
at least two of the radicals Z in formula (0) are alkyl radicals and no hydrogen, and with the proviso that the lactone block is bonded to the siloxane skeleton via SiC linkage.

M

= (R¹ ₃SiO_1/2),

M'

= (R¹ ₂R²SiO_1/2),

M"

= (R¹ ₂R³SiO_1/2),

D

= (R¹ ₂SiO_2/2),

D'

= (R¹R²SiO_2/2),

D"

= (R¹R³SiO_2/2),

T

= (R¹SiO_3/2) und

Q

= (SiO_4/2);

mit

a

= 0 bis 10, bevorzugt 0 bis 2, insbesondere 0,

b

= 0 bis 15, bevorzugt 0 bis 10, insbesondere 0, 2 bis 9,

c

= 0 bis 350, bevorzugt 5 bis 250, insbesondere 10 bis 150,

d

= 0 bis 50, bevorzugt 0 bis 20, insbesondere 0 oder 2 bis 10,

e

= 0 bis 100, bevorzugt 0 bis 50, insbesondere 0 oder 3 bis 30,

f

= 0 bis 12, bevorzugt 0 bis 8, insbesondere 0 oder 1 bis 7 und

g

= 0 bis 8, bevorzugt 0 bis 5, insbesondere 0 oder 1 bis 4,

mit der Maßgabe, dass $$\mathrm{b}\mathrm{+}\mathrm{e}\mathrm{\ge }\mathrm{1}$$

ist;
wobei
R¹ = unabhängig voneinander gleiche oder verschiedene lineare oder verzweigte, gegebenenfalls aromatische Kohlenwasserstoffreste mit 1 bis 30 Kohlenstoffatomen, die gegebenenfalls Hydroxyl- oder Esterfunktionen tragen, bevorzugt Methyl oder Phenyl, insbesondere Methyl,
R² = unabhängig voneinander gleiche oder verschiedene Polyetherreste, oder solche Reste der Formel (II)

und
R³ = unabhängig voneinander gleiche oder verschiedene Reste der allgemeinen Formeln (IIIa) oder (IIIb)

         -A(BC)_k      Formel (IIIa),

         -A(B'C')_k      Formel (IIIb),

wobei
C = unabhängig voneinander gleiche oder verschiedene Polyesterreste der Formel (IV)

B = unabhängig voneinander gleiche oder verschiedene zweibindige Heteroatom-Gruppen, bevorzugt ein Rest der Gruppe
-O-, -NH-, -NR¹⁴-,
A = unabhängig voneinander gleich oder verschieden ein (k+1)-bindiger organischer Rest, bevorzugt ein Rest der Gruppe: -CH₂-CHR⁹-(CH₂)_r-,

C' = unabhängig voneinander gleiche oder verschiedene Polyesterreste der Formel (V)

B' = unabhängig voneinander gleiche oder verschiedene zweibindige carbonylgruppenhaltige Reste, bevorzugt ein Rest der Gruppe:

sind,
mit
X = unabhängig voneinander gleich oder verschieden O oder NH, bevorzugt Sauerstoff O,
R⁴, R⁹ = unabhängig voneinander gleiche oder verschiedene lineare oder verzweigte Alkylreste mit 1 bis 16 Kohlenstoffatomen oder Wasserstoff, bevorzugt Methyl oder Wasserstoff, insbesondere Wasserstoff,
R⁵, R⁷ = unabhängig voneinander gleiche oder verschiedene Alkyl- oder Arylreste, bevorzugt Methyl, Ethyl oder Phenyl, insbesondere Methyl,
R⁶ = unabhängig voneinander gleiche oder verschiedene, gegebenenfalls verzweigte Alkylreste oder ein Acylrest, bevorzugt Methyl oder Acetyl,
R⁸, R¹⁰, R¹¹, R¹², R¹³ = unabhängig voneinander gleiche oder verschiedene lineare oder verzweigte Alkylreste mit 1 bis 16 Kohlenstoffatomen oder Wasserstoff, bevorzugt Methyl oder Wasserstoff, insbesondere Wasserstoff, und
R¹⁴ = unabhängig voneinander gleiche oder verschiedene lineare oder verzweigte Alkylreste mit 1 bis 16 Kohlenstoffatomen, insbesondere Methyl;
sowie
h = 0 bis 22, bevorzugt 0 bis 9, insbesondere 1,
i = 0 bis 50, bevorzugt 0 bis 30, insbesondere 5 bis 25,
j = 0 bis 50, bevorzugt 0 bis 30, insbesondere 0 bis 25,
k = 1 bis 3, bevorzugt 1 bis 2, insbesondere 1,
l = 0 bis 50, bevorzugt 0 bis 30, insbesondere 0 oder 4 bis 15,
m = 0 bis 50, bevorzugt 0 bis 30, insbesondere 0,
n, o, s, t = 0 bis 50, bevorzugt 1 bis 30, insbesondere 2 bis 20,
p, u = 1 bis 4, bevorzugt 2 bis 3, insbesondere 3,
q, v = 0 bis 50, bevorzugt 0 bis 30, insbesondere 2 bis 20,
r = 0 bis 22, bevorzugt 1 bis 9, insbesondere 1 oder 4,
w = 1 bis 5, bevorzugt 1 bis 3, insbesondere 2 und
x = 1 bis 4, bevorzugt 1 bis 3, insbesondere 1 bis 2,
ist,
mit der Maßgabe, dass n + o ≥ 2 oder s + t ≥ 2 ist.A preferred subject of the invention are polyester-modified siloxanes of the general formula (I)

M _{2 + f + 2g-ab} M _'a M _"b D _c D' _d D" _e T _f Q _g formula (I)

With

M

= (R ¹ ₃ SiO _1/2 ),

M '

= (R ¹ ₂ R ² SiO _1/2 ),

M "

= (R ¹ ₂ R ³ SiO _1/2 ),

D

= (R ¹ ₂ SiO _2/2 ),

D '

= (R ¹ R ² SiO _2/2 ),

D "

= (R ¹ R ³ SiO _2/2 ),

T

= (R ¹ SiO _3/2 ) and

Q

= (SiO _4/2 );

With

a

= 0 to 10, preferably 0 to 2, in particular 0,

b

= 0 to 15, preferably 0 to 10, in particular 0, 2 to 9,

c

= 0 to 350, preferably 5 to 250, in particular 10 to 150,

d

= 0 to 50, preferably 0 to 20, in particular 0 or 2 to 10,

e

= 0 to 100, preferably 0 to 50, in particular 0 or 3 to 30,

f

= 0 to 12, preferably 0 to 8, in particular 0 or 1 to 7 and

G

= 0 to 8, preferably 0 to 5, in particular 0 or 1 to 4,

with the proviso that $$\mathrm{b}\mathrm{+}\mathrm{e}\mathrm{\ge }\mathrm{1}$$

is;
in which
R ¹ = independently of one another identical or different linear or branched, optionally aromatic hydrocarbon radicals having 1 to 30 carbon atoms which optionally carry hydroxyl or ester functions, preferably methyl or phenyl, in particular methyl,
R ² = independently of one another identical or different polyether radicals, or such radicals of the formula (II)

and
R ³ = independently identical or different radicals of the general formulas (IIIa) or (IIIb)

-A (BC) _k formula (IIIa),

-A (B'C ') _k formula (IIIb),

in which
C = independently of one another identical or different polyester radicals of the formula (IV)

B = independently identical or different divalent heteroatom groups, preferably a radical of the group
-O-, -NH-, -NR ¹⁴ -,
A = independently of one another, identically or differently, a (k + 1) -binding organic radical, preferably a radical of the group: -CH ₂ -CHR ⁹ - (CH ₂ ) _r -,

C ' = independently identical or different polyester radicals of the formula (V)

B ' = independently of one another identical or different divalent carbonyl-containing radicals, preferably a radical of the group:

are,
With
X = independently of one another the same or different O or NH, preferably oxygen O,
R ⁴ , R ⁹ = independently of one another identical or different linear or branched alkyl radicals having 1 to 16 carbon atoms or hydrogen, preferably methyl or hydrogen, in particular hydrogen,
R ⁵ , R ⁷ = independently of one another identical or different alkyl or aryl radicals, preferably methyl, ethyl or phenyl, in particular methyl,
R ⁶ = independently of one another identical or different, optionally branched alkyl radicals or an acyl radical, preferably methyl or acetyl,
R ⁸ , R ¹⁰ , R ¹¹ , R ¹² , R ¹³ = independently identical or different linear or branched alkyl radicals having 1 to 16 carbon atoms or hydrogen, preferably methyl or hydrogen, in particular hydrogen, and
R ¹⁴ = independently identical or different linear or branched alkyl radicals having 1 to 16 carbon atoms, in particular methyl;
such as
h = 0 to 22, preferably 0 to 9, in particular 1,
i = 0 to 50, preferably 0 to 30, in particular 5 to 25,
j = 0 to 50, preferably 0 to 30, in particular 0 to 25,
k = 1 to 3, preferably 1 to 2, in particular 1,
l = 0 to 50, preferably 0 to 30, in particular 0 or 4 to 15,
m = 0 to 50, preferably 0 to 30, in particular 0,
n, o, s, t = 0 to 50, preferably 1 to 30, in particular 2 to 20,
p, u = 1 to 4, preferably 2 to 3, in particular 3,
q, v = 0 to 50, preferably 0 to 30, in particular 2 to 20,
r = 0 to 22, preferably 1 to 9, in particular 1 or 4,
w = 1 to 5, preferably 1 to 3, in particular 2 and
x = 1 to 4, preferably 1 to 3, in particular 1 to 2,
is
with the proviso that n + o ≥ 2 or s + t ≥ 2.

Preferably f + g ≥1, in particular ≥2, and b ≥3.
Further preferred are polyester-polysiloxane block copolymers of the formula (I) with d≥2 or those polyester-polysiloxane block copolymers with X = O and l≥3.

• sie ein Gemisch der beiden strukturisomeren Trimethylcaprolacton-Einheiten beinhalten,
• das Trimethylcaprolacton in racemischer aber auch enantiomerenreinen Form eingesetzt werden kann oder deren beliebigen Mischungen und
• im Polyestersegment des Produkts der Massenanteil an Trimethylcaprolacton ≥50% beträgt, d.h. (n+o)/q bzw. (s+t)/v≥1 ist.

Preferred polyester-polysiloxane block copolymers according to the invention are characterized in that

• they contain a mixture of the two structural isomeric trimethylcaprolactone units,
• the trimethylcaprolactone can be used in racemic but also enantiomerically pure form or any mixtures thereof and
• in the polyester segment of the product, the proportion by mass of trimethylcaprolactone is ≥50%, ie (n + o) / q or (s + t) / v≥1, respectively.

production:

Another object of the invention is a process for the reaction of OH, NRH or COOH-functional silicone macroinitiators with trimethylcaprolactone and optionally other lactones to polyester-polysiloxane block copolymers of the formula (I) using the catalysts bismuth (III) triflate or methylaluminoxane (MAO).

The OH, NRH or COOH-functional silicone macroinitiators required for the reaction with the lactones can be prepared by hydrosilylation of SiH-functional siloxanes with corresponding OH, NRH or COOH-functional alkenes or alkynes. Furthermore, the methods known to those skilled in the art, such as esterification or saponification reactions, can be prepared from suitable organomodified siloxanes.

The SiH-functional siloxanes used for the hydrosilylation are known by the methods of equilibration known to the person skilled in the art, such as, for example, in US Pat US 7,196,153 described, available. Branched siloxanes for the synthesis of the products of formula (I) with f + g ≥ 1 are specifically disclosed in the patent applications DE 10 2008 041601.0 and DE 10 2007 055485.2 accessible methods described.

The hydrosilylation with functional olefins or alkynes can be carried out according to established methods in the presence of a catalyst. Suitable hydrosilylation processes are described, for example, in the book " Chemistry and Technology of Silicones ", Verlag Chemie, 1960, page 43 , as in US 3,775,452 and EP 1520870 described, which is expressly referred to.

Examples of olefins which can be used for the hydrosilylation are 1-hexenol, allyloxyethanol, glycerol monoallyl ether, trimethylolpropane monoallyl ether, allyl alcohol, undecylenol, allylamine, N-allylethylenediamine, undecylenic acid, methyl undecylenic acid, trimethylsilyl undecylenate, alkyl acrylates, alkyl methacrylates, allyl polyethers or vinyl polyethers. Alkynes for hydrosilylation may be, for example, but-2-yn-1,4-diol or 1,4-dimethyl-but-2-yne-1,4-diol.

Optionally, the OH, NHR or COOR functional siloxanes produced in the hydrosilylation can be further reacted before the polyester is built up. The OH- or NHR-functional siloxanes can be converted, for example, with cyclic acid anhydrides to COOH-functional compounds. Examples of suitable acid anhydrides are maleic anhydride, succinic anhydride, methylhexahydrophthalic anhydride or phthalic anhydride.
The COOR-functional siloxanes can be converted, for example by saponification, to COOH-functional macroinitiators.

The reaction of the OH, NHR or COOH-functional siloxanes with trimethylcaprolactone and optionally further lactones takes place in the presence of a catalyst.

Catalysts described in the prior art are suitable. For example, tin (II) octoate is used very frequently. Tin compounds, however, are no longer desirable from the (environmental) -toxicological point of view in the future. In addition, relatively high temperatures are necessary for the implementation. Usually, temperatures of 110-160 ° C are selected.

Surprisingly, it has been found that the products according to the invention with bismuth (III) triflate or methylaluminoxane (MAO) can be prepared as catalysts in good yields (ie lactone conversions of> 70%) and under mild conditions (<100 ° C.) , Therefore, the synthesis is particularly advantageous in the presence of these catalysts at temperatures of about 80 ° C in about 8-24 h.

In the process of the invention, the starting materials are mixed with the catalyst and brought to reaction temperature. It may be useful to first mix the catalyst with a reactant and only then add the following starting materials. It may be useful to change the temperature during the reaction and to go through a temperature profile. In addition, it may be useful to pretreat the educts used with a method known to the skilled person, such as, for example, predrying. It may also be useful to add individual educts gradually. The reaction can be carried out continuously, batchwise or semicontinuously.

Bismuth (III) triflate is already catalytically active at low temperatures, ie at room temperature up to 100 ° C. In addition, only small amounts of bismuth (III) triflate are Catalyst necessary to get to good yields of the products of the invention. 0.01-0.05 mol% of catalyst, based on the lactone or the lactone mixture used, are sufficient to react the starting materials in technically acceptable reaction times. It is surprising to the person skilled in the art that bismuth (III) triflate does not cause the equilibration of the siloxane skeleton.

The bismuth (III) triflate can be deactivated by simple methods at the end of the reaction. For example, complexing reagents can be added or the bismuth (III) triflate can be removed from the reaction mixture by addition of precipitation reagents. Suitable precipitating reagents are e.g. Thiourea, dithiouracil or ethylthiooxamate.

Methylaluminoxane (MAO) is also particularly suitable as a catalyst in the context of the invention. In particular, MAO is suitable for making products whose polyester segment consists exclusively of trimethylcaprolactone units and at the same time has high conversions of lactone (> 70%). MAO is also catalytically active even under mild conditions (80-90 ° C). Surprisingly, MAO does not insert into the siloxane framework. In addition, MAO surprisingly does not cause equilibration of the siloxane skeleton.

Application:

Another object of the invention is the use of the polyester-polysiloxane block copolymers according to the invention in cleaning and care formulations, as plastic and paint additives and in formulations for the agricultural sector.

Compared to polyester-polysiloxane block copolymers based on simple lactones such as ε-caprolactone or δ-valerolactone from the prior art, the products according to the invention have increased compatibility in many application systems. They can therefore fulfill very useful additive functions such as curing, gloss-improving or other surface-modifying properties in these applications.

Use in cleansing and nourishing formulations:

Cleansing and conditioning formulations are used, for example, in cosmetics, for pharmaceutical applications and in home care applications. These are mostly water-in-oil or oil-in-water emulsions used. Additives such as silicones can perform different tasks in these formulations, for example they serve as emulsifiers or as additives for improving the feel on the skin.
In oils such as cosmetic oils (emollients), silicone additives can help to lower surface tension, spread better, and improve skin feel. The compatibility of the silicone with the cosmetic oil is very important.

The products of the invention can be compared to simple polyester-polysiloxane block copolymers based on e.g. Surprisingly, ε-caprolactone is much easier and homogeneously incorporated into many formulations. In the application, for example, they can bring about improved skin feel, improved spreading, increased emulsion stability and increased stabilization of pigments or UV absorbers.

Another object of the invention is therefore the use of the polyester-polysiloxane block copolymers according to the invention for the production of cosmetic, dermatological or pharmaceutical formulations and for preparing optionally dispersed solids containing care and cleaning agents for household or industrial, especially for hard surfaces, leather or textiles.

The cosmetic, dermatological or pharmaceutical compositions and formulations prepared with the aid of the polyester-polysiloxane block copolymers according to the invention and the home and industrial care and cleaning agents optionally dispersed solids and the care and cleaning agents for hard surfaces, leather or textiles containing at least one Polyester-polysiloxane block copolymer according to the invention are likewise provided by the invention.

A further subject of the invention is also the use of the compositions containing the polyester-polysiloxane block copolymers according to the invention for the preparation of formulations for the agricultural sector or as additives in paints or plastics.

The formulations according to the invention may contain, for example, at least one additional component selected from the group of emollients, co-emulsifiers and surfactants, thickeners / viscosity regulators / stabilizers, UV light protection filters, antioxidants, Hydrotropes (or polyols), solids and fillers, film formers, pearlescent additives, deodorant and antiperspirant active ingredients, insect repellents, self-tanning agents, preservatives, conditioners, perfumes, dyes, cosmetic agents, care additives, superfatting agents, solvents.

Substances which can be used as exemplary representatives of the individual groups are known to the person skilled in the art and can be used, for example, in the German application DE 10 2008 001788.4 be removed. This patent application is hereby incorporated by reference and thus forms part of the disclosure.

Preference is given to the use of polyester-polysiloxane block copolymers according to the invention for the preparation of cosmetic or pharmaceutical formulations. Such formulations may, for example, be creams, lotions or sprays, such as care creams, baby creams or sunscreen lotions, ointments, antiperspirants, deodorants or make-up. In particular, the cosmetic formulations may also be formulations such as make-ups or sunscreen products containing dispersed solids such as iron oxide pigments, titanium dioxide or zinc oxide particles.

Formulations of the invention may therefore find utility as a skin care, facial, head care, personal care, intimate, foot care, hair care, nail care, dental care or oral care product.

Formulations of the invention may be used in the form of an emulsion, suspension, solution, cream, ointment, paste, gel, oil, powder, aerosol, stick, spray, cleansing product, make-up or sunscreen preparation or a tonic.

Further objects of the invention will become apparent from the claims, the disclosure of which is fully subject matter of the description of this invention.

The polyester-modified siloxanes according to the invention are described below by way of example, without the invention being restricted to these exemplary embodiments. If below are indicated areas, general formulas or compound classes, these should not only include the corresponding areas or groups of connections that are explicitly mentioned, but also all subareas and subgroups of connections that can be removed by removing individual ones Values (ranges) or connections can be obtained. If documents are cited in the context of the present description, their contents are intended to form part of the disclosure content of the present invention. If, in the context of the present invention, compounds such as, for example, organomodified polysiloxanes, are described which may have various units in multiple form, these may occur randomly distributed (statistical oligomer) or ordered (block oligomer) in these compounds. Information on the number of units in such compounds is to be understood as an average, averaged over all corresponding compounds. Percentages (%) are by mass, unless otherwise specified.

In the examples given below, the present invention is described by way of example, without the invention and its scope being limited to the embodiments mentioned in the examples.

Examples: Used chemicals: Siloxane initiators Macro: Siloxane A: α, ω-OH-functional siloxane N = 30:

Made according to established methods (see for example EP 1 520 870 ) by Pt-catalyzed hydrosilylation of an α, ω-SiH siloxane (siloxane chain length N = 30) with 1-hexenol and subsequent vacuum distillation.
Hydroxy number (OHN) of the product: 47.6 mg KOH / g.

Siloxane B: α, ω-OH-functional siloxane N = 80:

Prepared according to established methods by Pt-catalyzed hydrosilylation of an α, ω-SiH siloxane (siloxane chain length N = 80) with 1-hexenol and subsequent vacuum distillation.
OH: 19.2 mg KOH / g.

Siloxane C: α, ω- and comb-OH functional siloxane:

Prepared by established methods by Pt-catalyzed hydrosilylation of a SiH siloxane of the formula Me ₂ HSiO- (Me ₂ SiO) ₁₃ - (MeHSiO) ₅ -SiHMe ₂ with 1-hexenol and subsequent vacuum distillation.
OH: 187.0 mg KOH / g.

Siloxane D: Combined polyether-functional siloxane:

Prepared by established methods by Pt-catalyzed hydrosilylation of a SiH siloxane of the formula Me ₃ SiO- (Me ₂ SiO) ₁₃ - (MeHSiO) ₅ -SiMe ₃ with 1.3 equivalents of an allyl polyether of the formula H ₂ C = CH-CH ₂ - (OCH ₂ CH ₂ ) ₁₃ -OH.
OH: 89.0 mg KOH / g.

Siloxane E: α, ω-NH ₂ -functional siloxane N = 30:

Prepared by established methods by tetramethylammonium hydroxide catalyzed equilibration of 1,3-bis (3-aminopropyl) -1,1,3,3-tetramethyldisiloxane (CAS [2469-55-8], ABCR) with octamethylcyclotetrasiloxane (D4, ABCR ).
Nitrogen content of the product: 1.3%.

Siloxane F: α, ω-COOH-functional siloxane N = 30:

Prepared by established methods from siloxane A by reaction with 4-methylhexahydrophthalic anhydride.
Acid number (SZ): 43 mg KOH / g.

After being weighed into the reaction vessel, the siloxane macroinitiators AF are freed of production-related, volatile constituents (inter alia water) for about 30 minutes at 5 × 10 ^-2 mbar in an oil pump vacuum.

Other reagents:

3,5,5-trimethylcaprolactone / 3,3,5-trimethylcaprolactone (= TMCL, CAS [2549-56-6] and [2549-57-7], Evonik Degussa GmbH) and ε-caprolactone (= eCL, acros) Stirred over CaH _{2 for} 24 h, then distilled off and stored under argon.
Bismuth (III) trifluoromethanesulfonate 99% (Aldrich), CAS [88189-03-1]
Tin (II) octoate 95% (Aldrich), CAS [301-10-0]
Methylaluminoxane 10% by weight in toluene (= MAO, Aldrich), CAS [120144-90-3], d = 0.875 g / cm ³
Thiourea 99% (Aldrich), CAS [62-56-6]
Dithiouracil 98% (Aldrich), CAS [2001-93-6]
Ethyl thiooxamate 95% (Aldrich), CAS [16982-21-19]
Dithizone 99% (Aldrich), CAS [60-10-6]

analytics:

500 MHz ¹ H NMR spectra, 125 MHz ¹³ C NMR and 79.5 MHz ²⁹ Si NMR spectra were recorded on a Bruker Avance DRX 500. The referencing of the ppm scale was carried out with the aid of the solvent signal of CDCl ₃ at 7.24 ppm and 77.0 ppm and by adding TMS (0 ppm) when recording ²⁹ Si NMR spectra.
DSC measurements were made with a Mettler DSC-822 instrument in a temperature range of -50 to 200 ° C at a heating rate of 10 ° C / min. For calibration, tin, indium and zinc standards were used.
GPC measurements were performed using THF (HPLC Grade, unstabilized, Biosolv) as eluent at room temperature with a flow rate of 1 ml / min on a system consisting of a FLOW pump, model Intelligent Pump AL-12, and a sample collector of the Schambeck SFD, model S5200. In this case, a precolumn of porosity 100 Å and three main columns "Gel Sdplus" MZ Analysentechnik GmbH was used, which have porosities of 10,000, 1000 and 100 Å and consist of a styrene-divinylbenzene copolymer. Upstream is a degasser from Schambeck, type Gastorr 150. The detectors used were a Waters 486 Turnable Absorbance Detector and a Schambeck SFD RI2000 Differential Refractometer. Calibration was performed using polystyrene standards ranging from 570 to 3,114,000 daltons. Toluene was added as an internal standard.

Example 1: Preparation of a polyester (PES) polydimethylsiloxane (PDMS) polyester (PES) triblock polymer [PES-b-PDMS-b-PES] by ring-opening polymerization (ROP) of eCL / TMCL (20 mol / OH-50 / 50) started on a hydroxyalkyl-functionalized siloxane (siloxane A) under tin catalysis

In a 500 ml four-necked flask equipped with reflux condenser, KPG stirrer, internal thermometer and argon introduction, under inert conditions, 75.0 g (32.2 mmol) of siloxane A (OHN 47.6 mg / g), 73.5 g (643 , 9 mmol) ε-caprolactone and 100.6 g (643.9 mmol) of trimethylcaprolactone (mixture of isomers) are stirred. The reaction mixture thus prepared is heated to 150 ° C., then 1.3 g (3.2 mmol) of tin (II) octoate (0.25 mol% based on lactone or 0.5% by weight of the total batch) are added, and more are added Stirred at 150 ° C for 8 hours. After completion of the reaction is freed at 80 ° C in an oil pump vacuum (5 · 10 ^-2 mbar) of all volatiles. A viscous, slightly yellowish polymer is obtained. The molecular weight distribution is according to GPC (THF): Mw = 10.734 g / mol and Mn = 7.272 g / mol. DSC analyzes in the temperature range of -50 to 200 ° C show a completely amorphous behavior of the polymer. The ¹ H / ¹³ C / ²⁹ Si NMR spectra correspond to expectations.

Example 2: Preparation of a [PES-b-PDMS-b-PES] triblock polymer by ROP of eCL / TMCL (20 mol / OH-60/40) started on a hydroxyalkyl-functionalized siloxane (siloxane A) under tin catalysis as described in Example 1

• 77.6 g (32.9 mmol) of siloxane A (OHN 47.6 mg / g)
• 90.2 g (790.3 mmol) of ε-caprolactone
• 82.3 g (526.8 mmol) of trimethylcaprolactone (mixture of isomers)
• 1.3 g (3.2 mmol) stannous octoate [0.5% by weight ad total batch]

The molecular weight distribution is according to GPC (THF): Mw = 11.932 g / mol and Mn = 9.214 g / mol.

DSC analyzes in the temperature range of -50 to 200 ° C show a completely amorphous behavior of the polymer.

The ¹ H / ¹³ C / ²⁹ Si NMR spectra correspond to expectations.

Example 3: Preparation of a [PES-b-PDMS-b-PES] triblock polymer by ROP of eCL / TMCL (20 mol / OH-70/30) started on a hydroxyalkyl-functionalized siloxane (siloxane A) under tin catalysis as described in Example 1

• 79.3 g (33.7 mmol) of siloxane A (OH value 47.6 mg / g)
• 107.6 g (942.7 mmol) of ε-caprolactone
• 63.1 g (403.9 mmol) of trimethylcaprolactone (mixture of isomers)
• 1.3 g (3.2 mmol) stannous octoate [0.5% by weight ad total batch]

The molecular weight distribution is according to GPC (THF): Mw = 12,344 g / mol and Mn = 9,014 g / mol.

DSC analyzes in the temperature range from -50 to 200 ° C show a partially crystalline behavior of the polymer with a melting range of 7-35 ° C, a peak maximum at 29 ° C and a melting enthalpy of 36 J / g.

The ¹ H / ¹³ C / ²⁹ Si NMR spectra correspond to expectations.

Example 4: Preparation of a [PES-b-PDMS-b-PES] triblock polymer by ROP of eCL / TMCL (20 mol / OH - 50/50) started on a hydroxyalkyl-functionalized siloxane (siloxane A) under bismuth catalysis

75.0 g (32.2 mmol) of siloxane A (OHZ 47.6 mg / g) are initially charged under inert conditions in a 500 ml four-necked flask equipped with reflux condenser, KPG stirrer, internal thermometer and argon introduction, and 422.6 mg ( 0.64 mmol) of the bi-catalyst (0.05 mol% based on lactone). It is stirred at 80 ° C until the catalyst is completely dissolved. Thereafter, a mixture of 73.5 g (643.9 mmol) of ε-caprolactone and 100.6 g (644.0 mmol) of trimethylcaprolactone (mixture of isomers) is added and the mixture is stirred at 80 ° C. for a further 8 hours. * After completion of the reaction is freed at 80 ° C in an oil pump vacuum (5 · 10 ^-2 mbar) of all volatiles. A viscous, slightly turbid polymer is obtained. The molecular weight distribution is according to GPC (THF): Mw = 7,005 g / mol and Mn = 4,596 g / mol. DSC analyzes in the temperature range of -50 to 200 ° C show a completely amorphous behavior of the polymer. The ¹ H / ¹³ C / ²⁹ Si NMR spectra correspond to expectations.

* Possible deactivation of the catalyst: Deactivation by means of precipitation reagent:

After the reaction has ended, about 97.4 mg (1.3 mmol) of thiourea (double excess based on catalyst) are added and the mixture is stirred for a further 3 hours. The reaction mixture is allowed to cool, taken up in 250 ml of chloroform and filtered several times until the filtrate is clear. The solvent is then stripped off on a rotary evaporator and freed of further volatile constituents at 80 ° C. and 5 × 10 ^-2 mbar in an oil pump vacuum. It will be a viscous, slightly yellowish cloudy polymer. The molecular weight distribution is according to GPC (THF): Mw = 7.106 g / mol and Mn = 4.498 g / mol.

Example 5: Preparation of a [PES-b-PDMS-b-PES] triblock polymer by ROP of eCL / TMCL (20 mol / OH - 50/50) started on a hydroxyalkyl-functionalized siloxane (siloxane A) under methylaluminoxane catalysis (MAO)

In a 1 L four-necked flask equipped with reflux condenser, KPG stirrer, internal thermometer and argon, 250 mL of toluene are placed and under inert conditions 75.0 g (32.2 mmol) of siloxane A (OHZ 47.6 mg / g), 73 , 5 g (643.9 mmol) of ε-caprolactone and 100.6 g (644.0 mmol) of trimethylcaprolactone (mixture of isomers) were added. The reaction mixture thus prepared is re-inertized and heated to 80 ° C, then 7.5 g (12.9 mmol MAO) Methylaluminoxanzubereitung (10% by weight in toluene), corresponding to 1 mol% bez. to total lactone added and stirred for 24 h at 80 ° C. After completion of the reaction, the solvent is removed on a rotary evaporator. *

By subsequent distillation at 80 ° C in an oil pump vacuum (5 · 10 ^-2 mbar) is then freed from all volatile components. A viscous, slightly turbid polymer is obtained. The molecular weight distribution is according to GPC (THF): Mw = 18.816 g / mol and Mn = 12.618 g / mol. DSC analyzes in the temperature range of -50 to 200 ° C show a completely amorphous behavior of the polymer. The ¹ H / ¹³ C / ²⁹ Si NMR spectra correspond to expectations.

* Possible deactivation of the catalyst:

After distilling off the toluene is taken up in the same volume of chloroform, which previously concentrated with a few drops. Hydrochloric acid was acidified (10 drops / 500 mL). A rapid shaking in a separating funnel destroys the catalyst complex, which can be filtered off. Excess acid is trapped by repeated shaking with dilute potassium bicarbonate solution and the solvent removed after prior filtration on a rotary evaporator.

Example 6: Preparation of a [PTMCL-b-PDMS-b-PTMCL] triblock polymer by ROP of TMCL (40 mol / OH) on a hydroxyalkyl-functionalized siloxane (siloxane A) under methylaluminoxane catalysis (MAO)

In a 1 L four-necked flask equipped with reflux condenser, KPG stirrer, internal thermometer and argon inlet, 250 mL of toluene are placed and under inert conditions 39.7 g (16.8 mmol) of siloxane A (OHZ 47.6 mg / g) and 210 , 3 g (1.35 mol) of trimethylcaprolactone (mixture of isomers) was added. The reaction mixture thus prepared is re-inertized and heated to 80 ° C, then 7.8 g and 8.9 mL (13.5 mmol) of methylaluminoxane preparation (10% by weight in toluene), corresponding to 1 mol% bez. was added to the total amount of lactone and stirred at 80 ° C for 24 h. After completion of the reaction, the solvent is removed on a rotary evaporator. By subsequent distillation at 80 ° C in an oil pump vacuum (5 · 10 ^-2 mbar) is then freed from all volatile components. It is obtained a highly viscous, slightly cloudy polymer. The molecular weight distribution is according to GPC (THF): Mw = 18.816 g / mol and Mn = 12.618 g / mol. DSC analyzes in the temperature range of -50 to 200 ° C show a completely amorphous behavior of the polymer. The ¹ H / ¹³ C / ²⁹ Si NMR spectra correspond to expectations.

Example 7: Preparation of a [PES-b-PDMS-b-PES] triblock polymer by ROP from eCL / TMCL (20 mol / OH-50/50) started on a hydroxyalkyl-functionalized siloxane (siloxane B) under tin catalysis

In a 500 mL four-necked flask equipped with reflux condenser, KPG stirrer, internal thermometer and argon introduction under inert conditions, 129.9 g (22.2 mmol) of siloxane B (OHN 19.2 mg / g), 50.7 g (444 g). 2 mmol) of ε-caprolactone and 69.4 g (444.2 mmol) of trimethylcaprolactone (mixture of isomers) are stirred. The reaction mixture thus prepared is heated to 150 ° C., then 0.9 g (2.2 mmol) of tin (II) octoate (0.25 mol% based on lactone or 0.36% by weight total ad) are added and more Stirred at 150 ° C for 8 hours. After completion of the reaction is freed at 80 ° C in an oil pump vacuum (5 · 10 ^-2 mbar) of all volatiles. A viscous, slightly turbid yellowish polymer is obtained. The molecular weight distribution is according to GPC (THF): Mw = 17,221 g / mol and Mn = 11,495 g / mol. DSC analyzes in the temperature range of -50 to 200 ° C show a completely amorphous behavior of the polymer. The ¹ H / ¹³ C / ²⁹ Si NMR spectra correspond to expectations.

Example 8: Preparation of a polyester-modified siloxane by means of ROP of eCL / TMCL (5 mol / OH-50/50) started on a hydroxyalkyl-functionalized siloxane (siloxane C) under tin catalysis

In a 500 mL four-necked flask equipped with reflux condenser, KPG stirrer, internal thermometer and argon introduction under inert conditions, 76.9 g (32 mmol) of siloxane C (OHN 187 mg KOH / g), 73.1 g (640.4 mmol) ε-caprolactone and 100.1 g (640.8 mmol) of trimethylcaprolactone (mixture of isomers) are stirred. The reaction mixture thus prepared is heated to 150 ° C., then 1.3 g (3.2 mmol) of tin (II) octoate (0.25 mol% based on lactone or 0.5% by weight of the total batch) are added, and more are added Stirred at 150 ° C for 8 hours. After completion of the reaction is freed at 80 ° C in an oil pump vacuum (5 · 10 ^-2 mbar) of all volatiles. This gives 34 g of distillate and a viscous, slightly yellowish polymer. The molecular weight distribution is according to GPC (THF): Mw = 35,336 g / mol and Mn = 6,149 g / mol. The ¹ H / ¹³ C / ²⁹ Si NMR spectra correspond to expectations.

Example 9: Preparation of a polyester-modified siloxane by means of ROP of eCL / TMCL (20 mol / OH-50/50) started on a hydroxyalkyl-functionalized siloxane (siloxane C) under tin catalysis

In a 500 mL four-necked flask equipped with reflux condenser, KPG stirrer, internal thermometer and argon introduction under inert conditions, 25 g (10.4 mmol) of siloxane C (OHN 187 mg KOH / g), 95.0 g (832.3 mmol) ε-caprolactone and 130.0 g (832.2 mmol) of trimethylcaprolactone (mixture of isomers) are stirred. The reaction mixture thus prepared is heated to 150 ° C., then 1.3 g (3.2 mmol) of tin (II) octoate (0.25 mol% based on lactone or 0.5% by weight of the total batch) are added, and more are added Stirred at 150 ° C for 8 hours. After completion of the reaction is freed at 80 ° C in an oil pump vacuum (5 · 10 ^-2 mbar) of all volatiles. This 42 g of distillate and a viscous, slightly yellowish polymer are obtained. The molecular weight distribution is according to GPC (THF): Mw = 37383 g / mol and Mn = 9.746 g / mol. The ¹ H / ¹³ C / ²⁹ Si NMR spectra correspond to expectations.

Example 10: Preparation of a [PES-b-PDMS-b-PES] carboxy-terminated triblock polymer by ROP of eCL / TMCL (20 mol / OH-50/50) started on a carboxyalkyl-functionalized siloxane (Siloxane F) under tin catalysis

In a 500 mL four-necked flask equipped with reflux condenser, KPG stirrer, internal thermometer and argon introduction, 81.4 g (31.2 mmol) of a carboxy-functionalized siloxane (siloxane F) (b.p. 43 mg KOH / g), 71.2 g, are obtained under inert conditions g (623.8 mmol) of ε-caprolactone and 97.4 g (623.7 mmol) of trimethylcaprolactone (mixture of isomers) were stirred. The reaction mixture thus prepared is heated to 150 ° C., then 1.3 g (3.2 mmol) of tin (II) octoate (0.25 mol% based on lactone or 0.5% by weight of the total batch) are added, and more are added Stirred at 150 ° C for 8 hours. After completion of the reaction is freed at 80 ° C in an oil pump vacuum (5 · 10 ^-2 mbar) of all volatiles. In this case, a highly viscous, slightly yellowish polymer is obtained. The molecular weight distribution is according to GPC (THF): Mw = 10,124 g / mol and Mn = 7,801 g / mol. The ¹ H / ¹³ C / ²⁹ Si NMR spectra correspond to expectations.

Example 11: Preparation of a [PES-b-PDMS-b-PES] triblock polymer by ROP of eCL / TMCL (20 mol / OH-50/50) started on an aminoalkyl-functionalized siloxane (siloxane E) under tin catalysis

In a 500 ml four-necked flask equipped with reflux condenser, KPG stirrer, internal thermometer and argon introduction under inert conditions, 71.2 g (33.1 mmol) of siloxane E (N content: 1.3% by weight), 75.5 g ( 661.3 mmol) of ε-caprolactone and 103.3 g (661.3 mmol) of trimethylcaprolactone (mixture of isomers) were stirred. The reaction mixture thus prepared is heated to 150 ° C., then 1.3 g (3.2 mmol) of tin (II) octoate (0.25 mol% based on lactone or 0.5% by weight of the total batch) are added, and more are added Stirred at 150 ° C for 8 hours. After completion of the reaction is freed at 80 ° C in an oil pump vacuum (5 · 10 ^-2 mbar) of all volatiles. This gives 44.7 g of distillate and a viscous, slightly yellowish polymer. The molecular weight distribution is according to GPC (THF): Mw = 11,100 g / mol and Mn = 5,760 g / mol. The ¹ H / ¹³ C / ²⁹ Si NMR spectra correspond to expectations.

Example 12: Preparation of a comb-type polyester-modified siloxane by means of ROP of eCL / TMCL (20 mol / OH-50/50) started on a polyether-modified siloxane (siloxane D) under tin catalysis

In a 500 mL four-necked flask equipped with reflux condenser, KPG stirrer, internal thermometer and argon introduction under inert conditions, 92.1 g (29.2 mmol) of siloxane D (OHZ 89 mg KOH / g), 66.7 g (584.4 mmol) of ε-caprolactone and 91.3 g (584.4 mmol) of trimethylcaprolactone (mixture of isomers) are stirred. The reaction mixture thus prepared is heated to 150 ° C., then 1.3 g (3.22 mmol) of tin (II) octoate (0.25 mol% based on lactone or 0.5% by weight ad total mixture) are added and more Stirred at 150 ° C for 8 hours. After completion of the reaction is freed at 80 ° C in an oil pump vacuum (5 · 10 ^-2 mbar) of all volatiles. This 43.5 g of distillate are recovered. There is also obtained a viscous, slightly yellowish polymer. The molecular weight distribution according to GPC (THF) is: Mw = 11,244 g / mol and Mn = 3,959 g / mol. The ¹ H / ¹³ C / ²⁹ Si NMR spectra correspond to expectations.

Comparative Example 13 (not according to the invention): Preparation of a [PES-b-PDMS-b-PES] triblock polymer by ROP of eCL (15 mol / OH) started on a hydroxyalkyl-functionalized siloxane (siloxane A) under tin catalysis

In a 500 mL four-necked flask equipped with reflux condenser, KPG stirrer, internal thermometer and argon introduction under inert conditions, 55.9 g (24.0 mmol) of siloxane A (OHN 47.6 mg / g) and 82.2 g (720 g) of 2 mmol) of ε-caprolactone. The reaction mixture thus prepared is heated to 150 ° C, then 0.7 g (2.2 mmol) of tin (II) octoate (0.5 wt% ad total charge) was added and stirred at 150 ° C for a further 8 hours. After completion of the reaction is freed at 80 ° C in an oil pump vacuum (5 · 10 ^-2 mbar) of all volatiles. It is obtained after cooling, a crystalline, slightly yellowish polymer, which shows a melting range of 50 - 62 ° C. The molecular weight distribution is according to GPC (THF): Mw = 13,601 g / mol and Mn = 7,111 g / mol. The ¹ H / ¹³ C / ²⁹ Si NMR spectra correspond to expectations.

Comparative Example 14 (not according to the invention): Preparation of a [PES-b-PDMS-b-PES] triblock polymer by ROP of eCL (20 mol / OH) started on a hydroxyalkyl-functionalized siloxane (siloxane B) under tin catalysis

In a 500 mL four-necked flask equipped with reflux condenser, KPG stirrer, internal thermometer and argon introduction under inert conditions, 140.4 g (24.0 mmol) of siloxane B (OHN 19.2 mg / g) and 109.6 g (960 g) are added. 6 mmol) of ε-caprolactone. The reaction mixture thus prepared is heated to 150 ° C, then 1.3 g (2.2 mmol) of tin (II) octoate (0.5 wt% ad total charge) was added and stirred at 150 ° C for a further 8 hours. After completion of the reaction is freed at 80 ° C in an oil pump vacuum (5 · 10 ^-2 mbar) of all volatiles. It is obtained after cooling, a crystalline, slightly yellowish polymer which shows a melting range of 50-58 ° C according to DSC analyzes in the temperature range of -50 to 200 ° C. The molecular weight distribution is according to GPC (THF): Mw = 17.603 g / mol and Mn = 10.731 g / mol. The ¹ H / ¹³ C / ²⁹ Si NMR spectra correspond to expectations.

Application examples:

In oils such as cosmetic oils (emollients), silicone additives can help to lower the surface tension and thus improve spreadability and skin feel. The dispersion properties can also be improved. The compatibility of the silicone with the cosmetic oil is an important prerequisite.

The products of this invention can be easily incorporated and dissolved in a range of cosmetic oils as compared to simple caprolactone-based polyester-polysiloxane block copolymers (see Table 1). <b> Table 1: </ b> Solubility of selected polyester siloxanes according to the invention in a series of cosmetic oils (nomenclature according to INCI): Polyester siloxane Aggregate state at 25 ° C Solubility 0.2% in diethylhexyl carbonates ^a Solubility 0.2% in C _12-15 alkyl benzoates ^b Solubility 0.2% in Caprylic / Capric Triglycerides ^c Solubility 0.2% in PPG-14 butyl ether ^d example 1 Liquid, amorphous clearly soluble clearly soluble clearly soluble insoluble Example 6 Liquid, amorphous clearly soluble clearly soluble clearly soluble clearly soluble Example 7 Pasty, amorphous clearly soluble almost clear, opaque clearly soluble insoluble Comparative Example 13 Solid, crystalline insoluble insoluble insoluble insoluble Comparative Example 14 Solid, crystalline insoluble insoluble insoluble insoluble ^a Diethylhexyl Carbonate: Tegosoft ^® DEC (Evonik Goldschmidt GmbH), ^b C _12-15 Alkyl Benzoate: Tegosoft ^® TN (Evonik Goldschmidt GmbH), ^c Caprylic / Capric Triglyceride: Tegosoft ^® CT (Evonik Goldschmidt GmbH), ^d PPG-14 Butyl ether: Tegosoft ^® PBE (Evonik Goldschmidt GmbH).

Table 1 clearly shows that the polyester siloxanes 1, 6 and 7 according to the invention with a proportion of TMCL in the polyester block have good compatibility with a range of cosmetic oils. By contrast, comparative examples 13 and 14, which are based on polyester blocks with exclusively eCL, are insoluble in all 4 cosmetic oils.

By virtue of the examples according to the invention being soluble in the cosmetic oils, the spreading of the oil on the skin is markedly improved in comparison to the pure oil and in comparison to the blend with Comparative Example 13 or 14.

Claims (15)

Polyester-polysiloxane block copolymers having multiply substituted lactone monomer units. Polyester-polysiloxane block copolymers according to claim 1, characterized in that the lactone monomer unit is repeatedly substituted by alkyl groups. Polyester-polysiloxane block copolymers according to claim 2, characterized in that the alkyl groups are methyl groups. Polyester-polysiloxane block copolymers according to at least one of claims 1 to 3, characterized in that at least three multiply substituted lactone monomer units and optionally other non-substituted or singly substituted lactone monomer units are contained. Polyester-polysiloxane block copolymers according to claim 4, characterized in that the multiply substituted lactone monomer units are identical or different and are described by the general formula (0):

in which
Z = independently of one another identical or different linear or branched alkyl radicals having 1 to 6 carbon atoms or hydrogen, preferably methyl or hydrogen and
y = 1 to 5, preferably 2 to 4, in particular 4,
with the proviso that
at least two of the radicals Z in formula (0) are alkyl radicals and no hydrogen and with the proviso that
the lactone block is bonded to the siloxane skeleton via SiC linkage. Polyester-polysiloxane block copolymers according to claim 5, characterized in that at least partially trimethlycaprolactone is used for the construction of the polyester block and compounds of general formula (I)

M _{2 + f + 2g-ab} M _'a M _"b D _c D' _d D" _e T _f Q _g formula (I)

With M = (R ¹ ₃ SiO _1/2 ), M '= (R ¹ ₂ R ² SiO _1/2 ), M "= (R ¹ ₂ R ³ SiO _1/2 ), D = (R ¹ ₂ SiO _2/2 ), D '= (R ¹ R ² SiO _2/2 ), D "= (R ¹ R ³ SiO _2/2 ), T = (R ¹ SiO _3/2 ) and Q = (SiO _4/2 ); With a = 0 to 10, b = 0 to 15, c = 0 to 350, d = 0 to 50, e = 0 to 100, f = 0 to 12, g = 0 to 8, with the proviso that $$\mathrm{b}\mathrm{+}\mathrm{e}\mathrm{\ge }\mathrm{1}$$

is;
in which
R ¹ = independently of one another identical or different linear or branched, optionally aromatic hydrocarbon radicals having 1 to 30 carbon atoms which optionally carry hydroxyl or ester functions, preferably methyl or phenyl, in particular methyl,
R ² = independently of one another identical or different polyether radicals, or such radicals of the formula (II)

and
R ³ = independently identical or different radicals of the general formulas (IIIa) or (IIIb)

-A (BC) _k formula (IIIa),

-A (B'C ') _k formula (IIIb),

in which
C = independently of one another identical or different polyester radicals of the formula (IV)

B = independently of one another identical or different divalent heteroatom groups, preferably a radical of the group -O-, -NH-, -NR ¹⁴ -,
A = independently of one another, identically or differently, a (k + 1) -binding organic radical, preferably a radical of the group: -CH ₂ -CHR ⁹ - (CH ₂ ) _r -,

C ' = independently identical or different polyester radicals of the formula (V)

B ' = independently of one another identical or different divalent carbonyl-containing radicals, preferably a radical of the group:

are,
With
X = independently of one another the same or different O or NH, preferably oxygen O,
R ⁴ , R ⁹ = independently identical or different linear or branched alkyl radicals having 1 to 16 carbon atoms or hydrogen, preferably methyl or hydrogen, in particular hydrogen, R ⁵ , R ⁷ = independently identical or different alkyl or aryl radicals, preferably methyl, Ethyl or phenyl, especially methyl,
R ⁶ = independently identical or different, optionally branched alkyl radicals or an acyl radical, preferably methyl or acetyl, R ⁸ , R ¹⁰ , R ¹¹ , R ¹² , R ¹³ = independently identical or different linear or branched alkyl radicals having 1 to 16 carbon atoms or hydrogen, preferably methyl or hydrogen, in particular hydrogen, and R ¹⁴ = independently of one another identical or different linear or branched alkyl radicals having 1 to 16 carbon atoms, in particular methyl;
such as
h = 0 to 22, preferably 0 to 9,
i = 0 to 50, preferably 0 to 30,
j = 0 to 50, preferably 0 to 30,
k = 1 to 3, preferably 1 to 2,
l = 0 to 50, preferably 0 to 30,
m = 0 to 50, preferably 0 to 30,
n, o, s, t = 0 to 50, preferably 1 to 30,
p, u = 1 to 4, preferably 2 to 3,
q, v = 0 to 50, preferably 0 to 30,
r = 0 to 22, preferably 1 to 9,
w = 1 to 5, preferably 1 to 3 and
x = 1 to 4, preferably 1 to 3,
with the proviso that
n + o ≥ 2 or s + t ≥ 2. Polyester-polysiloxane block copolymers according to claim 6, formula (I) with (n + o) / q and (s + t) / v ≥1, respectively. Polyester-polysiloxane block copolymers according to claim 6, characterized in that f + g ≥1 and b ≥3. Polyester-polysiloxane block copolymers according to at least one of claims 6 to 8 with d ≥ 2 applies. Polyester-polysiloxane block copolymers according to at least one of claims 6 to 9 with X = O and I ≥3 applies. Process for the preparation of polyester-polysiloxane block copolymers according to one of Claims 1 to 10, characterized in that OH, NRH or COOH-functional silicone macroinitiators with trimethylcaprolactone and optionally further lactones give polyester-polysiloxane block copolymers of the formula (I) be implemented with the help of the catalysts. Process for the preparation of polyester-polysiloxane block copolymers according to one of Claims 1 to 10, characterized in that the catalyst used is methylaluminoxane MAO or bismuth (III) triflate. Compositions containing polyester-polysiloxane block copolymers according to at least one of claims 1 to 10. Use of the compositions according to Claim 13 as additive for the production of cosmetic, dermatological or pharmaceutical formulations and for the preparation of dispersed solids-containing care and cleaning compositions for domestic or industrial use for hard surfaces, leather or textiles. Use of at least one of the compositions according to claim 13 for the preparation of formulations for the agro-area or as additives in paints or plastics.